/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package core.test;

import core.net.DropboxRequest;
import core.net.Json;
import core.oauth.ServiceFactory;
import core.pojos.DropboxDir;
import core.pojos.DropboxItem;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URISyntaxException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import static org.scribe.model.OAuthConstants.EMPTY_TOKEN;
import org.scribe.model.Token;
import org.scribe.model.Verifier;
import org.scribe.oauth.OAuthService;

/**
 *
 * @author vudn
 */
public class DropboxCallback extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String code = request.getParameter("code");
        
        if (code != null) {
            OAuthService service = ServiceFactory.create(ServiceFactory.DROPBOX);
            Verifier verifier = new Verifier(code.toString());
            Token token = service.getAccessToken(EMPTY_TOKEN, verifier);

            DropboxRequest req = new DropboxRequest(token);
            String json = "";
            try {
                json = req.list("");
            } catch (URISyntaxException ex) {
                Logger.getLogger(DropboxCallback.class.getName()).log(Level.SEVERE, null, ex);
            }

            // deserialize json string to list DropBoxItem
            DropboxDir dir = Json.ToDropboxDir(json);
            StringBuilder list = new StringBuilder();
            for (DropboxItem item : dir.items) {
                list.append(item.path + "&nbps;" + item.bytes + "<br />");
            }
            
            response.sendRedirect(request.getParameter("state") + "?token=" + token.getToken());

            //print result
            response.setContentType("text/html;charset=UTF-8");
            try (PrintWriter out = response.getWriter()) {
                /* TODO output your page here. You may use following sample code. */
                out.println("<!DOCTYPE html>");
                out.println("<html>");
                out.println("<head>");
                out.println("<title>Servlet OauthCallback</title>");
                out.println("</head>");
                out.println("<body>");
                out.println("<h1>Client:  " + request.getParameter("state") + "</h1>");
                out.println("<h1>access token:  " + token + "</h1>");
                out.println("Listing:  " + list.toString());
                out.println("</body>");
                out.println("</html>");
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
